Variable List

The variable list controls which variables are included in the case
profile plot.  Selected variables are marked with a preceding `+'.

First choose among `Toggle,' `Select', and `Deselect.'  Then use
the *middle* button to highlight variables in the list to be
selected or deselected.  You can either click on one at a time, or
you can drag the cursor to select (or toggle or deselect) a
contiguous list of variables.

You can also click on `Select All' or `Deselect All' to
select/deselect faster than you would be able to using the mouse.
